CN106545299A - A kind of new combination tooth PDC drill bit - Google Patents
A kind of new combination tooth PDC drill bit Download PDFInfo
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- CN106545299A CN106545299A CN201510600009.0A CN201510600009A CN106545299A CN 106545299 A CN106545299 A CN 106545299A CN 201510600009 A CN201510600009 A CN 201510600009A CN 106545299 A CN106545299 A CN 106545299A
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Abstract
The invention discloses a kind of new combination tooth PDC drill bit, including bit body, a plurality of scraper is distributed with bit body, the cutting tooth structure outline of scraper includes inner cone, nose, outer cone, shoulder and gauge block, and a plurality of scraper is provided with various cutting tooths；As front, in the scraper on bit body, the front toothrow at least one scraper includes two kinds of shearing tooths for direction of rotation when being cut with scraper, and the rear toothrow on the scraper at least includes a kind of shearing tooth or a kind of limiting tooth；Shearing tooth includes two kinds of disk shearing tooth and ridged shearing tooth, and limiting tooth includes two kinds of sphere Cylinder Gear and tapered cylinder tooth.The present invention is by designing the bit cutting toothing that various cutting tooth mix and match and drill bit cutting-in are controlled, the torque ripple of drill bit can be reduced, improve drill bit abrasive resistant and shock proof ability, extend the life-span of Cutter, and improve cutting power, adaptability and the rate of penetration of drill bit, strengthen the stability of drill bit, be that user reduces drilling cost.
Description
Technical field
The present invention relates to a kind of diamond bit, more particularly to a kind of it is applied to the hard of oil and natural gas drilling well
The new combination tooth PDC drill bit of stratum drilling.
Background technology
In the exploration and development of oil and natural gas resource in recent years, deep drilling and ultradeep well become raising
The main force of petrol resources exploitation, in such oil/gas drilling, can usually run into hard formation and abrasive layer,
Therefore the bit speed of hard formation and abrasive layer is improved, is become shortening drilling period and is reduced drilling cost
Important channel and method.It is known that in hard formation and abrasive layer drilling well, in order to improve drill bit
Stability and extend drill bit service life, it will usually using increase the pressure of the drill method come realize improve drilling well
Speed.It is available for the bite type that people select to be divided into rifler and fixed cutter drill bits, in drilling practice
In, it has been found that, rifler drilling well in hard formation and abrasive layer, due to the bearing of rifler
The characteristics of life-span and gear wheel cutting tooth broken formation, repetition of the drilling cuttings in shaft bottom, crush, and often result in this brill
Head is in deep-well and ultra-deep well drilling so that the rate of penetration of rifler is low and short life, frequently changes and bores
The round trip time that headband comes is long, increased drilling period and improves labor intensity, considerably increases
Drilling cost.In the soft strata drilling to medium hardness, first-selected PDC drill bit drilling well has become oil drilling work
The behavioral standard of industry；However, in drilling practice, vibrations drill bit what strata drilling in office can all be produced,
The vibrations that hard formation drilling bit occurs are even more serious, can produce drill bit " convolution ", can cause PDC drill bit
Serious premature wear, can accelerate the passivation or drill bit failure of drill bit；More bit change can increase, tripping operation
Time, drilling cost can be increased.
In harder strata drilling, stability of bit becomes increasing challenge；People are not intended to the shake of drill bit
The dynamic passivation or failure for bringing drill bit, it can cause unnecessary trip-out.Existing drill bit design, has
Part can adapt to the strata drilling of Different Strata hardness, and drill bit can properly increase rate of penetration and can connect
The bit life received and durability, the previous drill bit design of comparison, reduce drill bit generally using the pressure of the drill is increased
Vibrations, for example, some drill bits are designed with low aggressive back rake angle and creep into hard formation, such design
The pressure of the drill must be increased in hard formation drilling.However, using PDC drill bit drilling process, people are not intended to make
High the pressure of the drill is used, because increasing the pressure of the drill, the length increased by drill collar increases the pressure loss of drill string, meeting
Increase pressure and the power consumption of pump, the abrasion of centralizer and drill string can be increased, reduce drilling efficiency and drilling well
Cost.In drilling well simultaneously, increase the pressure of the drill, the abrasion of drill bit and the speed of drill bit rust can be accelerated, can be increased
Using the quantity of drill bit；Under conditions of drill bit is worn-out, the use time extended by drill bit, in order to can
Under the conditions of the drilling speed of acceptance, only increase the pressure of the drill, due to drill bit abrasion and the pressure of the drill between relation be not line
Sexual intercourse, but exponential relationship；In particular formation, increase the pressure of the drill of little value under existing the pressure of the drill, it will
Drastically accelerate the abrasion of Cutter, because the thermal wear of tooth and impact failure can accelerate the damage of tooth.
Therefore, the speed increased by hard formation drilling well is selected more it is necessary to change previous drill bit mentality of designing
Many profiles of tooth and more cutting tooth cloth toothings, change drill bit wedging mode and abrasion feature, increase drill bit
Abrasive resistant ability and working life, increase the durability of cutting tooth extending bit life, using various profiles of tooth
Design meet drillng operation to the effective aggressivity of hard formation, improve the drilling speed that new drill structure remains higher.
The content of the invention
The purpose of the present invention is that to solve the above problems and provides a kind of new combination tooth PDC drill bit.
The present invention is achieved through the following technical solutions above-mentioned purpose：
A kind of new combination tooth PDC drill bit, including bit body, are distributed with a plurality of scraper on the bit body,
The cutting tooth structure outline of the scraper includes inner cone, nose, outer cone, shoulder and gauge block, a plurality of described
Scraper is provided with various cutting tooths；Direction of rotation when being cut with the scraper as front, on the bit body
The scraper in, the front toothrow at least one scraper includes two kinds of shearing tooths, on the scraper after
Toothrow at least includes a kind of shearing tooth or a kind of limiting tooth；The shearing tooth includes that disk shearing tooth and ridged are cut
Two kinds of cutting, the limiting tooth include two kinds of sphere Cylinder Gear and tapered cylinder tooth.
Preferably, in the scraper on the bit body, at least including a scraper, its front toothrow point
Inner cone, nose, outer cone, shoulder and the gauge block of the blade profile are distributed in, its front toothrow is by disk shearing tooth
Constitute with ridged shearing tooth, the disk shearing tooth and ridged shearing tooth on same scraper is spaced apart；The scraper
Rear toothrow at least include a kind of shearing tooth or a kind of limiting tooth.
Preferably, the shearing tooth in the rear toothrow of the scraper include being distributed in the blade profile inner cone,
The disk shearing tooth and ridged shearing tooth of nose, outer cone, shoulder and gauge block, it is spacing in the rear toothrow
Tooth is distributed in inner cone, nose, outer cone and the shoulder position of the drill bit blade profile.
Or, the front toothrow that is made up of various shearing tooths and many is equipped with every scraper on the bit body
Toothrow after kind；0 °～30 ° of back rake angle is provided between front-seat shearing tooth and cutting face on every scraper；Often
The shearing tooth in rear toothrow on bar scraper and between cutting face, it is provided with 15 °～37 ° of back rake angle；Scrape per bar
The limiting tooth in rear toothrow on knife and between cutting face, it is provided with -8 °～+8 ° of top rake.
Or, various front toothrows and various rear toothrows are equipped with every scraper on the bit body；Per bar
Proud exposure of the proud exposure of the front toothrow on scraper more than rear toothrow, difference in height is between 0～3 millimeter.
Preferably, in all of cutting tooth, tapered cylinder tooth, sphere Cylinder Gear, disk shearing tooth
The composite teeth for polycrystal diamond composite teeth being with ridged shearing tooth or being manufactured by polycrystalline superabrasive materials in the form.
In above-mentioned all structures, the title implication of each cutting tooth is as follows：
Front toothrow：In oil/gas drilling in recent years, the scraper of the conventional PDC drill bit for using is usually using double
The cloth tooth mode of toothrow, direction of rotation when being cut with scraper as front, in the cutting tooth of the front-seat arrangement of scraper
Commonly referred to front toothrow；
Toothrow afterwards：It is corresponding with front toothrow, in the commonly referred to rear toothrow of the cutting tooth of scraper heel row arrangement；
Shearing tooth：Shearing tooth is referred to as with the cutting tooth that cut mode cuts stratum.Conventional PDC drill bit is scraped
Disk PDC teeth are installed on knife, stratum is cut with cut mode, and according to appropriate back rake angle and angle of heel reality
The rapid drilling of existing drill bit, assembling form of this disk PDC teeth in bit are referred to as disk shearing tooth；
Above-mentioned ridged shearing tooth, matrix material and shape it is all identical with disk shearing tooth, the installation in bit
Mode is also identical with disk shearing tooth, it is also possible to be described using the same back rake angle and angle of heel.
But, the cutting face of ridged shearing tooth is different from disk shearing tooth, and concrete structure sees below specific embodiment
It is described；In addition, disk shearing tooth only has an angle of heel or 0 ° of angle of heel, and ridged shearing tooth has two sides
Inclination angle, one is interior angle of heel, and another is outer angle of heel.
Limiting tooth：The effect of all restricted PDC drill bit cutting-in of the rear toothrow of conventional PDC drill bit, different shearings
The assembling form of tooth and with limit PDC drill bit cutting-in function tooth post be referred to as limiting tooth, limiting tooth typically hangs down
It is straight to be arranged on the blade profile of PDC drill bit.
The beneficial effects of the present invention is：
The bit cutting toothing that the present invention is controlled by the various cutting tooth mix and match of design and drill bit cutting-in,
The torque ripple of drill bit can be reduced, drill bit abrasive resistant and shock proof ability is improved, extends Cutter
Life-span, and cutting power, adaptability and the rate of penetration of drill bit are improved, strengthen the stability of drill bit, be
User reduces drilling cost；It is embodied in：
1st, using scraper type double rows of teeth cloth toothing, improve the teeth consolidating quality of drill bit；Before and after same scraper
Toothrow is arranged, improves drill bit design variation and the ability for selecting, can be selected according to drilling stratum feature
Suitable structure.Front toothrow selects disk/ridged shearing tooth mix and match combination, changes disk or ridged is cut
Cutting structure single structure feature, enhances the structural stability of drill bit.
2nd, using scraper type double rows of teeth cloth toothing, select the combination of suitable forward and backward toothrow：It is preferred that suitable
Proud exposure, control the every of drill bit turn cutting-in, the stability of drill bit can be improved, be conducive to drill bit to reduce
The control of torque ripple and tool-face, is conducive to extending bit life.
3rd, using scraper type double rows of teeth cloth toothing, can according to directional well and the operating type of horizontal well drilling,
Using suitable blade profile structure；According to the hardness and abrasiveness feature on stratum, different cutting tooth classes are selected
Type applies the diverse location in blade profile；Can be conducive to carrying according to the characteristics of different teeth and broken rock feature
The shock resistance of high drill bit, abrasive resistant ability improve the rate of penetration and bit life of drill bit, reach reduction and bore
The purpose of well cost.
Description of the drawings
Fig. 1 is the sectional structure front view of new combination tooth PDC drill bit of the present invention；
Fig. 2 is the vertical view figure structure schematic representation of the new combination tooth PDC drill bit described in the embodiment of the present invention 1；
Fig. 3 is the vertical view figure structure schematic representation of the new combination tooth PDC drill bit described in the embodiment of the present invention 2；
Fig. 4 is the vertical view figure structure schematic representation of the new combination tooth PDC drill bit described in the embodiment of the present invention 3；
Fig. 5 A are the main structure diagrams of disk shearing tooth of the present invention；
Fig. 5 B are the left view structural representations of disk shearing tooth of the present invention；
Fig. 6 A are one of main structure diagrams of ridged shearing tooth of the present invention；
Fig. 6 B are one of left view structural representations of ridged shearing tooth of the present invention；
Fig. 7 A are the two of the main structure diagram of ridged shearing tooth of the present invention；
Fig. 7 B are the two of the left view structural representation of ridged shearing tooth of the present invention；
Fig. 8 A are the three of the main structure diagram of ridged shearing tooth of the present invention；
Fig. 8 B are the three of the left view structural representation of ridged shearing tooth of the present invention；
Fig. 9 A are the main structure diagrams of sphere Cylinder Gear of the present invention；
Fig. 9 B are the left view structural representations of sphere Cylinder Gear of the present invention；
Figure 10 A are the main structure diagrams of tapered cylinder tooth of the present invention；
Figure 10 B are the left view structural representations of tapered cylinder tooth of the present invention；
Figure 11 is back rake angle change schematic diagram of the disk shearing tooth of the present invention on scraper；
Figure 12 is the Change of anteversion schematic diagram of tapered cylinder tooth in limiting tooth of the present invention on scraper；
Figure 13 is tapered cylinder tooth in the back rake angle and limiting tooth of ridged shearing tooth of the present invention on scraper
Top rake schematic diagram, while showing the cutting-in height change of forward and backward toothrow.
Specific embodiment
The invention will be further described below in conjunction with the accompanying drawings：
As shown in figure 1, new combination tooth PDC drill bit of the present invention includes bit body 8, on bit body 8
Be distributed with a plurality of scraper 13, the cutting tooth structure outline of scraper 13 include inner cone 1, nose 2, outer cone 3,
Shoulder 4 and gauge block 5, a plurality of scraper 13 are provided with various cutting tooths；Rotation side when being cut with scraper 13
To for front, in the scraper 13 on bit body 8, the front toothrow at least one scraper 13 includes two kinds
Shearing tooth, such as：Front-seat shearing tooth includes 11 two kinds of disk shearing tooth 10 and ridged shearing tooth, the scraper
Rear toothrow (see the description of Fig. 2, Fig. 3 and Fig. 4) on 13 at least includes a kind of shearing tooth or a kind of spacing
Tooth；Shearing tooth includes two kinds of disk shearing tooth and ridged shearing tooth, the limiting tooth include sphere Cylinder Gear and
Two kinds of tapered cylinder tooth.Nozzle passage 9 on bit body 8,6 and of bit central runner are also described in Fig. 1
Drill bit male thread joint 7, passive gauge tooth 15, nozzle passage 9 can install nozzle (without showing), bore
During well, drill bit male thread joint 7 is linked together with drill string (without display in figure).Drill bit in drilling process
Center flow channels 6 can provide drilling fluid through nozzle passage 9, and drilling fluid is by nozzle directive shaft bottom, drilling well liquid energy
Enough bottom-hole cleanings and cooling cutting tooth (including disk shearing tooth 10 and ridged shearing tooth 11) can carry rock
Bits leave shaft bottom, flow through and annular space arrival ground is returned on chip area 17.
Below with three embodiments introducing three kinds of entirety of new combination tooth PDC drill bit of the present invention respectively
The scraper 60 of the scraper 40, Fig. 4 of the scraper 20, Fig. 3 of structure, wherein Fig. 2 respectively with Fig. 1 in scrape
13 correspondence of knife, the disk shearing tooth 47 and ridge of the disk shearing tooth 27 and ridged shearing tooth 25, Fig. 3 of Fig. 2
The disk shearing tooth 67 and ridged shearing tooth 65 of shape shearing tooth 45, Fig. 4 is sheared with the disk in Fig. 1 respectively
11 correspondence of tooth 10 and ridged shearing tooth, the nozzle passage of the nozzle passage 21 and chip area 23, Fig. 3 of Fig. 2
44 and chip area 42, Fig. 4 nozzle passage 64 and chip area 62 respectively with Fig. 1 in nozzle passage 9 and
17 correspondence of chip area；The change of this reference numerals is that, in order to be described for different structure, its essence is all
It is the same.
Embodiment 1：
As depicted in figs. 1 and 2, include a plurality of scraper 20 on bit body 8, at least including a scraper 20,
Its front toothrow is made up of disk shearing tooth 27 and ridged shearing tooth 25；Disk shearing tooth 27 on same scraper 20
It is spaced apart with ridged shearing tooth 25, i.e., then a piece of ridged shearing tooth 25 is distributed for one disk shearing tooth 27
Repeat this process ...；Disk shearing tooth 27 and ridged shearing tooth 25 are distributed in the wheel of the scraper 20
Wide inner cone 1, nose 2, outer cone 3, shoulder 4 and gauge block 5；The rear toothrow of the scraper 20 at least includes
A kind of limiting tooth 29, limiting tooth 29 are sphere Cylinder Gear.Disk shearing tooth 27 and ridged shearing tooth 25 with scrape
There is back rake angle (referring to Figure 11) between knife cutting face, the value of back rake angle changes between 5～30 °；Scraper
The mounting means of the limiting tooth 29 on 20 is different from disk shearing tooth 27, axis and the scraper 20 of limiting tooth 29
Cutting face between have a top rake (referring to Figure 12), the value of top rake changes between -8～+8 °；The scraper
20 disk shearing tooth 27 and the proud exposure of ridged shearing tooth 25 are high more than the exposure of the limiting tooth 29 of heel row
Degree, difference in height is between 0～3 millimeter.In fig. 2, there is nozzle passage 21, drilling fluid is provided during drilling well clear
Well-flushing bottom and cooling cutting tooth, drilling fluid carrying drilling cuttings are left shaft bottom and return annular space to ground on chip area 23.
Passive gauge tooth 15 is located at the front row of the gauge block 5 of blade profile in FIG, and it is disk shearing tooth.
Embodiment 2：
As shown in figures 1 and 3, include a plurality of scraper 40 on bit body 8, at least including a scraper 40,
Its front toothrow is made up of disk shearing tooth 45 and ridged shearing tooth 47, the disk shearing tooth on same scraper 40
45 and ridged shearing tooth 47 be spaced apart, i.e., then a piece of ridged shearing tooth distribution is laid equal stress on for one disk shearing tooth
Multiple this process ...；Disk shearing tooth 45 and ridged shearing tooth 47 are distributed in the profile of the scraper 40
Inner cone 1, nose 2, outer cone 3, shoulder 4 and gauge block 5, the rear toothrow of the scraper 40 include two kinds it is spacing
Tooth, two kinds of limiting tooths are ball roller tooth 49 and tapered cylinder tooth 51 respectively.Ball roller tooth 49 is distributed in
The inner cone 1 of the profile of scraper 40, nose 2；Tapered cylinder tooth 51 be distributed in the profile of scraper 40 nose 2,
Outer cone 3 and shoulder 4.Used as another distressed structure, tapered cylinder tooth 51 can be distributed in the wheel of the scraper 40
The inner cone 1 of exterior feature, nose 2, outer cone 3, shoulder 4.As a kind of distressed structure, ball roller tooth 49 and cone
Shape Cylinder Gear 51 can be with interaction arrangement in the heel row of scraper 40；Ball roller tooth 49 and tapered cylinder tooth 51
The inner cone 1 of the profile of scraper 40, nose 2, outer cone 3, shoulder 4 can be distributed in.Circle on scraper 40
There are back rake angle (referring to Figure 11), hypsokinesis between piece shearing tooth 45 and ridged shearing tooth 47 and scraper cutting face
The value at angle changes between 5～30 °；The ball roller tooth 49 and tapered cylinder tooth 51 of heel row on scraper 40
Mounting means be different from disk shearing tooth 45, ball roller tooth 49 and tapered cylinder tooth 51 axis and scrape
There is a top rake (referring to Figure 12) in 40 cutting face of knife, and the value of top rake changes between -8～+8 °；The scraper
40 front-seat disk shearing tooths 45 and 47 proud exposure of ridged shearing tooth are more than the ball roller tooth 49 and cone of heel row
The proud exposure of shape Cylinder Gear 51, difference in height is between 0～3 millimeter.In figure 3, there is nozzle flow channel 44
Drilling fluid can be provided to pass through.Drilling fluid bottom-hole cleaning and cooling cutting tooth are provided during drilling well, drilling fluid is carried and bored
Bits leave shaft bottom and return annular space to ground on chip area 42.Passive gauge tooth 15 is located at scraper in FIG
The front row of the gauge block 5 of profile, it is disk shearing tooth.
Embodiment 3：
As shown in Figure 1 and Figure 4, include a plurality of scraper 60 on bit body 8, at least including a scraper 60,
Its front toothrow is made up of disk shearing tooth 66 and ridged shearing tooth 68, the disk shearing tooth on same scraper 60
66 and ridged shearing tooth 68 be spaced apart, i.e., then a piece of ridged shearing tooth distribution is laid equal stress on for one disk shearing tooth
Multiple this process ...；Disk shearing tooth 66 is distributed in the inner cone 1 of the profile of the scraper 60, nose 2, outer
Cone 3, shoulder 4 and gauge block 5；Ridged shearing tooth 68 is distributed in the inner cone 1, nose of the profile of the scraper 60
Portion 2, outer cone 3, shoulder 4；The rear toothrow of the scraper 60 includes that the disk shearing tooth 70 and ridged of heel row is cut
Cutting 72 and two kind of tooth interaction arrangement are in the nose 2 of 60 profile of scraper, outer cone 3, shoulder 4；The scraper 60
Rear toothrow also include limiting tooth, limiting tooth is ball roller tooth 74 and is distributed in the interior of the profile of scraper 60
Cone 1, nose 2；Used as a kind of selection, the ball roller tooth 74 of the scraper 60 can be replaced by tapered cylinder tooth
Change.
After having between the disk shearing tooth 66 at the front row on scraper 60 and ridged shearing tooth 68 and scraper cutting face
Inclination angle (refers to Figure 11), and the value of back rake angle changes between 5～30 °；The disk of the heel row of the scraper 60
There is back rake angle (referring to Figure 11) between shearing tooth 70 and ridged shearing tooth 72 and scraper cutting face, back rake angle
It is worth and changes between 15～37 °；The mounting means of the ball roller tooth 74 of the heel row on scraper 60 is different from
Disk shearing tooth 66, has top rake (referring to Figure 12) between the axis of ball roller tooth 74 and scraper cutting face,
The value of top rake changes between -8～+8 °；The disk shearing tooth 66 and ridged shearing tooth at 60 front row of scraper
68 proud exposure is more than ball roller tooth 74, disk shearing tooth 70 and the ridged shearing of 60 heel row of scraper
The proud exposure of tooth 72, difference in height is between 0～3 millimeter.In the diagram, there are nozzle flow channel 64, drilling well
When provide drilling fluid bottom-hole cleaning and cooling cutting tooth, drilling fluid carry drilling cuttings leave shaft bottom through chip area 62
On return annular space to ground.Passive gauge tooth 15 is located at the front row of the gauge block 5 of blade profile in FIG, it
It is disk shearing tooth.
In above three embodiment, on bit body 8 in all of cutting tooth, tapered cylinder tooth 51, bulb circle
Post tooth 29,49 and 74, disk shearing tooth 27,66 and 70, ridged shearing tooth 47,68 and 72 are poly-
Diamond composite teeth or the composite teeth manufactured by polycrystalline superabrasive materials in the form.
Below in conjunction with the accompanying drawings to it is several with the structure of more tooth is specifically described：
As fig. 5 a and fig. 5b, a kind of disk shearing tooth, including polycrystalline diamond composite material and/or
Disc diamond layer 75, curved surface faying face 79 and the multiple grain tungsten carbide tool that polycrystalline superabrasive materials in the form is constituted is compound
The matrix 77 that material is formed, forms in high temperature and high pressure environment.Between disk shearing tooth and the cutting face of scraper
Have a forward and backward inclined angle, commonly referred to as back rake angle (referring to Figure 11), the back rake angle be arranged on 5 °～
Scope between 30 °.It is a kind of disk shearing tooth in embodiment 1,2,3.
As shown in Figure 6 A and 6 B, the first ridged shearing tooth, including polycrystalline diamond composite material and/
Or polycrystalline superabrasive materials in the form constitute ridged diamond layer 80, ridge rib 89, two arc surfaces on the outside of ridge rib 89
83rd, the matrix 87 that curved surface faying face 85 and multiple grain carbonization composite tungsten material are formed, in high temperature and high pressure environment
Formed.The ridge rib 89 of ridged shearing tooth can bias 1～1.5 millimeter of symmetrical center line, the width of ridge rib 89
It can be 1.5～2.5 millimeters.There is a forward and backward inclined folder between ridged shearing tooth and the cutting face of scraper
Angle, commonly referred to as back rake angle (refer to Figure 11), and the back rake angle is arranged on the scope between 5 °～30 °.It
It is a kind of ridged shearing tooth in embodiment 1,2,3.
As shown in figures 7 a and 7b, second ridged shearing tooth, including polycrystalline diamond composite material and/
Or polycrystalline superabrasive materials in the form constitute ridged diamond layer 90, ridge rib 99, two tapered planes on the outside of ridge rib 99
92nd, the matrix 97 that curved surface faying face 95 and multiple grain carbonization composite tungsten material are formed, in high temperature and high pressure environment
Formed.The ridge rib 99 of ridged shearing tooth can bias 1～1.5 millimeter of symmetrical center line, the width of ridge rib 99
It can be 1.5～2.5 millimeters.There is a forward and backward inclined angle between ridged shearing tooth and scraper cutting face,
Commonly referred to as back rake angle (referring to Figure 11), the back rake angle are arranged on the scope between 5 °～30 °.It is real
Apply a kind of ridged shearing tooth in example 1,2,3.
As shown in Figure 8 A and 8 B, the third ridged shearing tooth, including polycrystalline diamond composite material and/
Or polycrystalline superabrasive materials in the form constitute ridged diamond layer 104 (being made up of the face of cylinder and frustum face), ridge rib 100,
Two tapered planes 102 (burnishing surface) and/or two cambered surfaces 106, multiple grain tungsten carbide tool composite wood on the outside of ridge rib 100
The matrix 105 that material is formed, can form in high temperature and high pressure environment.The ridge rib 100 of ridged shearing tooth can be inclined
1～1.5 millimeter of symmetrical center line is put, the width of ridge rib 100 can be 2～3 millimeters.Ridged shearing tooth with scrape
There are a forward and backward inclined angle, commonly referred to as back rake angle (referring to Figure 11), the hypsokinesis between knife cutting face
Angle is arranged on the scope between 5 °～30 °.It is a kind of ridged shearing tooth in embodiment 1,2,3.
As shown in fig. 9 a and fig. 9b, the spherical diamond that a kind of ball roller tooth, including sphere 108 is constituted
Layer, the diamond layer is made up of polycrystalline diamond composite material and/or polycrystalline superabrasive materials in the form, with shock resistance,
Abrasive resistant and heat-staple performance；Formed with on-plane surface faying face 109 and multiple grain carbonization composite tungsten material
Matrix 107 forms the tooth together in high temperature and high pressure environment.Ball roller tooth can also be chosen and generally be carbonized
The tooth post of tungsten material；Have an angle between the axis of ball roller tooth and scraper cutting face, commonly referred to as before
Inclination angle (refers to Figure 12), and the top rake is between -8 °～+8 °.It is on scraper in examples detailed above after
Row's limiting tooth.
As shown in Figure 10 and Figure 10 B, a kind of tapered cylinder tooth, including the conical surface Buddha's warrior attendant that taper surface 111 is constituted
Rock layers, the conical surface diamond layer are made up of polycrystalline diamond composite material and/or polycrystalline superabrasive materials in the form, are had
Shock resistance, abrasive resistant and heat-staple performance；With on-plane surface faying face 115 and multiple grain tungsten carbide tool composite wood
The matrix 118 that material is formed forms the tapered cylinder tooth together in high temperature and high pressure environment.Taper surface 111 and taper
There are an angle 113, scope of the angle between 28 °～+66 ° between the axis of Cylinder Gear.Tapered cylinder
Have an angle, commonly referred to as top rake between the axis of tooth and scraper cutting face, the top rake -8 °～
Between+8 °.It is the heel row limiting tooth in above-described embodiment on scraper.
Figure 11 shows the arrangement of disk shearing tooth in Fig. 1, Fig. 2, Fig. 3, Fig. 4 and Fig. 5 on scraper,
The back rake angle change schematic diagram of disk shearing tooth during bit cutting stratum, the back rake angle change include：Just
Three kinds of forms of back rake angle, 0 degree of back rake angle and minus caster；D, E in Figure 11 represents plus caster respectively
Angle, the angle of minus caster.Disk shearing tooth scraper 20, scraper 40 and is scraped in figs. 2,3 and 4
Back rake angle change on knife 60 is equally applicable to ridged shearing tooth on scraper 20, scraper 40 and scraper 60
Back rake angle changes.
Figure 12 describes Change of anteversion of the axis of the tapered cylinder tooth in Fig. 3 and Figure 10 on scraper 40
Schematic diagram, the Change of anteversion include：Negative top rake, positive top rake and 0 degree of top rake, J in Figure 12,
K represents negative top rake, the angle of positive top rake respectively.The axis of tapered cylinder tooth 51 is in scraper in figure 3
The change between -8 °～+8 ° of upper 40 top rake be equally applicable to the scraper 20 in Fig. 2, Fig. 3 and Fig. 4,
The Change of anteversion of the ball roller tooth 29,49 and 74 on scraper 40 and scraper 60.
Figure 13 describes the cutting characteristic of ridged shearing tooth, and back rake angle D, back rake angle D are disposed with scraper
Change between 5 °～+30 °；When simultaneously describing tapered cylinder tooth and arranging on scraper, there is top rake K
Change between -8 °～+8 °.Describe the tapered cylinder of the proud exposure than heel row of front-seat ridged shearing tooth
The proud exposure of tooth is higher, has height difference H (changing between 0～3 millimeter).Equally, the cone in Figure 13
Shape Cylinder Gear can be replaced with ball roller tooth, and ball roller tooth is used as the heel row limiting tooth of scraper, with cone
The top rake and proud exposure of shape Cylinder Gear.
Disk shearing tooth and ridged shearing tooth in diamond bit in the present invention, and tapered cylinder tooth and
Ball roller tooth has diamond layer, and the diamond layer has polycrystalline superabrasive materials in the form；The super grinding material of polycrystalline
Material includes diamond and natural diamond particles, diamond and natural diamond monocrystalline and microgranule
Mixing, containing the polycrystalline superabrasive materials in the form such as cubic boron nitride；Various cutting tooths include polycrystalline superabrasive materials in the form and
Catalyst material of the hard alloy substrate used in the technical process of high temp/high pressure (" HTHP "), being capable of shape
Into the disk shearing tooth of the ridged shape tooth and polycrystalline superabrasive materials in the form of desired polycrystalline superabrasive materials in the form, same energy
Tapered cylinder tooth and ball roller tooth are formed enough.
In the technical process of the high temp/high pressure (" HTHP ") of above-mentioned formation polycrystalline superabrasive materials in the form, can add
Complete in the forcing press of the high temp/high pressure of heat.Up under 1420 DEG C of temperature conditionss, high pressure about exists general high temperature
Under the conditions of high pressure between 5.5GPa～7.8GPa；Although the accurate behaviour of high temp/high pressure (HTHP) technique
Make parameter concrete composition and quantity according to the various materials being currently in use change.In high temp/high pressure
Forcing press in pressure can setting concrete constant high temp/high pressure (" HTHP ") under the conditions of, maintain
About within the time of 50 seconds～21 minutes, the conical tooth and polycrystalline that can form polycrystalline superabrasive materials in the form super grinds
The disk shearing tooth of mill material.
Above-described embodiment is presently preferred embodiments of the present invention, is not the restriction to technical solution of the present invention,
As long as without the technical scheme that creative work can be realized on the basis of above-described embodiment, all should regard
To fall in the rights protection scope of patent of the present invention.
Claims (6)
1. a kind of new combination tooth PDC drill bit, including bit body, is distributed with a plurality of scraping on the bit body
Knife, the cutting tooth structure outline of the scraper include inner cone, nose, outer cone, shoulder and gauge block, a plurality of
The scraper is provided with various cutting tooths；It is characterized in that：Direction of rotation when being cut with the scraper is as front
Side, in the scraper on the bit body, the front toothrow at least one scraper includes two kinds of shearing tooths,
Rear toothrow on the scraper at least includes a kind of shearing tooth or a kind of limiting tooth；The shearing tooth includes disk
Two kinds of shearing tooth and ridged shearing tooth, the limiting tooth include two kinds of sphere Cylinder Gear and tapered cylinder tooth.
2. new combination tooth PDC drill bit according to claim 1, it is characterised in that：The drill bit
In the scraper on body, at least including a scraper, its front toothrow be distributed in the blade profile inner cone,
Nose, outer cone, shoulder and gauge block, its front toothrow are made up of disk shearing tooth and ridged shearing tooth, same
Disk shearing tooth and ridged shearing tooth on scraper is spaced apart；The rear toothrow of the scraper is at least cut including one kind
Cutting or a kind of limiting tooth.
3. new combination tooth PDC drill bit according to claim 2, it is characterised in that：The scraper
Rear toothrow in shearing tooth include being distributed in inner cone, nose, outer cone, shoulder and the gauge of the blade profile
The disk shearing tooth and ridged shearing tooth of block, the limiting tooth in the rear toothrow are distributed in the drill bit blade profile
Inner cone, nose, outer cone and shoulder position.
4. new combination tooth PDC drill bit according to claim 1, it is characterised in that：The drill bit
The front toothrow and various rear toothrows being made up of various shearing tooths is equipped with every scraper on body；Every scraper
On front-seat shearing tooth and cutting face between be provided with 0 °～30 ° of back rake angle；In rear toothrow on every scraper
Shearing tooth and cutting face between be provided with 15 °～37 ° of back rake angle；The limit in rear toothrow on every scraper
- 8 °～+8 ° of top rake is provided between position tooth and cutting face.
5. new combination tooth PDC drill bit according to claim 1, it is characterised in that：The drill bit
Various front toothrows and various rear toothrows are equipped with every scraper on body；Front toothrow on every scraper goes out
Proud exposure of the dew height more than rear toothrow, difference in height is between 0～3 millimeter.
6. the new combination tooth PDC drill bit according to any one of claim 1-5, it is characterised in that：
In all of cutting tooth, tapered cylinder tooth, sphere Cylinder Gear, disk shearing tooth and ridged shearing tooth are equal
The composite teeth manufactured for polycrystal diamond composite teeth or by polycrystalline superabrasive materials in the form.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510600009.0A CN106545299A (en) | 2015-09-18 | 2015-09-18 | A kind of new combination tooth PDC drill bit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510600009.0A CN106545299A (en) | 2015-09-18 | 2015-09-18 | A kind of new combination tooth PDC drill bit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106545299A true CN106545299A (en) | 2017-03-29 |
Family
ID=58362206
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510600009.0A Pending CN106545299A (en) | 2015-09-18 | 2015-09-18 | A kind of new combination tooth PDC drill bit |
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| Country | Link |
|---|---|
| CN (1) | CN106545299A (en) |
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Application publication date: 20170329 |
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